13 May 2003: militants from the PRI affiliated to the organization Campesino Torch and The Revolutionary Agrarian League of the South Emiliano Zapata (LARSEZ) engage in a violent confrontation in Zapotitlán Tablas for political reasons. The confrontation leaves four dead, 42 wounded and nine disappeared.

5 June 2003: four indigenous people are murdered in Barranca Guadalupe, Montaña. According to a leader of the Organization of the Me’phaa Indigenous Peoples (OPIM), the victims have ties to a group of paramilitaries.